Naughty Marietta is a 1935 film based on the operetta of the same name by Victor Herbert: Jeanette MacDonald stars as a vivacious Princess who trades places with her maid Marietta in order to avoid an arranged marriage. Instead, she sails for New Orleans and is rescued from pirates by Captain Richard Warrington (Nelson Eddy), with whom she falls in love. Five of Victor Herbert's most famous songs come from the score of Naughty Marietta, with words by lyricist Rida Johnson Young: Additional lyrics for several of Herbert's songs were penned for the movie by Gus Kahn. The songs "Ah! Sweet Mystery of Life" and "I'm Falling in Love With Someone" were used in the Broadway adaptation of Thoroughly Modern Millie. The film was written by Frances Goodrich, Albert Hackett, John Lee Mahin and Rida Johnson Young. To avoid a forced marriage with Don Carlos, an elderly Spanish duke, the beautiful and vivacious Princess Marie masquerades as her uncle's former servant, Marietta, to escape from France on a ship with casquette girls who are traveling to New Orleans to marry colonists (planters, farmers and soldiers etc.).